My tilt gear cracked a long time ago, and it took me forever to find a good solution to the problem. Here is the gear i bought to replace it with.
http://www3.omnimodels.com/cgi-bin/w...I=HMXE8011&P=0
if that link is dead search for hmxe8011 its a 12 tooth pinion gear with a 2.3mm hole, to work with the displays it needs drilled out to 3mm. I trashed my first one trying to drill it by hand. the one i have working now i drilled out with a dremil drill press attachment and rotary chuck on it.
It doesn't have a 3mm hole, so i had to drill it out to 3mm, but its working now.
My display has been taken apart on my bench for about 6 months though, and i'm having trouble getting it to close now though. tilt and agles are working fine now though, i had cracked the junk plastic gear for tilt.